Compounds act at multiple prostaglandin receptors giving a general anti-inflammatory response

ABSTRACT

The present invention provides compounds, that are N-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide wherein the 5 substituent is selected from the group consisting of halo and alkyloxy radicals. The compound may be represented by the following formula 
     
       
         
         
             
             
         
       
         
         wherein R 1  is selected from the group consisting of CO 2 R 7  and 
         CON(R 7 )SO 2 R 7  wherein R 1 , R 2 , R 3 , R 4 , and R 7  are as defined in the specification. The compounds may be administered to treat DP 1 , FP, EP 1 , EP 3 , TP and/or EP 4  receptor mediated diseases or conditions.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is related to U.S. Patent Application Ser. No.61/375,406, filed on Aug. 20, 2010, which is hereby incorporated byreference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to compounds, to processes for their preparation,to pharmaceutical compositions containing them and to their use inmedicine, in particular their use in the treatment of conditionsmediated by the action of ligands for the DP₁, FP, TP, EP₁ EP₃ and EP₄prostaglandin (PG) receptors. The present compounds have the generalstructure shown below and act at different prostaglandin receptors tothereby provide a general anti-inflammatory response.

2. Background of the Related Art

The EP₁ receptor is a 7-transmembrane receptor and its natural ligand isthe prostaglandin PGE₂. PGE₂ also has affinity for the other EPreceptors (types EP₂, EP₃ and EP₄). The EP₁ receptor is associated withsmooth muscle contraction, pain (in particular inflammatory, neuropathicand visceral), inflammation, allergic activities, renal regulation andgastric or enteric mucus secretion.

Prostaglandin E₂ (PGE₂) exerts allodynia through the EP₁ receptorsubtype and hyperalgesia through EP₂ and EP₃ receptors in the mousespinal cord. Furthermore, it has been shown that in the EP₁ knockoutmouse pain-sensitivity responses are reduced by approximately 50%. EP₁receptor antagonist (ONO-8711) reduces hyperalgesia and allodynia in arat model of chronic constriction injury and inhibits mechanicalhyperalgesia in a rodent model of post-operative pain. The efficacy ofEP₁ receptor antagonists in the treatment of visceral pain in a humanmodel of hypersensitivity has been demonstrated. Thus, selectiveprostaglandin ligands, agonists or antagonists, depending on whichprostaglandin E receptor subtype is being considered, haveanti-inflammatory, antipyretic and analgesic properties similar to aconventional non-steroidal anti-inflammatory drug, and in addition,inhibit hormone-induced uterine contractions and have anti-cancereffects. These compounds have a diminished ability to induce some of themechanism-based side effects of NSAIDs, which are indiscriminatecyclooxygenase inhibitors. In particular, the compounds have a reducedpotential for cardiovascular toxicity, a reduced effect on bleedingtimes and a lessened ability to induce asthma attacks inaspirin-sensitive asthmatic subjects. Moreover, as a result of sparingpotentially beneficial prostaglandin pathways, these agents may haveenhanced efficacy over NSAIDS and/or COX-2 inhibitors. (See Pub. No. US2005/0065200 for other diseases that may be treated by EP4 receptorantagonists which is hereby incorporated by reference in its entirety.)

EP₃ receptors have been implicated in pain and hyperalgesia andhypepyrexia. Thus, EP₃ antagonists may be useful for treating pain,inflammation and fever. Additional uses include treatment of pre-termlabor, over-active bladder disorders, cancer and cardiovascular disease.

The TP (also known as TxA₂) receptor is a prostanoid receptor subtypestimulated by the endogenous mediator thromboxane. Activation of thisreceptor results in various physiological actions primarily incurred byits platelet aggregatory and smooth muscle constricting effects, thusopposing those of prostacyclin receptor activation.

TP receptors have been identified in human kidneys in the glomerulus andextraglomerular vascular tissue. Activation of TP receptors constrictsglomerular capillaries and suppresses glomerular filtration ratesindicating that TP receptor antagonists could be useful for renaldysfunction in glomerulonephritis, diabetes mellitus and sepsis.

Activation of TP receptors induces bronchoconstriction, an increase inmicrovascular permeability, formation of mucosal edema and mucussecretion, which are typical characteristic features of bronchialasthma. TP antagonists have been investigated as potential asthmatreatments resulting in, for example, orally active Seratrodast(AA-2414). Ramatroban is another TP receptor antagonist currentlyundergoing phase III clinical trials as an anti-asthmatic compound.

Since the DP₁ receptor may trigger an asthmatic response in certainindividuals, compounds that have DP₁ antagonist properties may be usefulas anti-asthmatic drugs. (See Pub. No. 2004/0162323 for the disclosureof other diseases and conditions that may be treated with DPantagonists.) Finally, the FP receptor modulates intraocular pressureand mediates smooth muscle contraction of the sphincter muscles in thegastrointestinal tract and the uterus. Thus, antagonists of the FPreceptor are useful for treating reproductive disorders. (See U.S. Pat.No. 6,511,999 for other diseases and conditions that may be treated withFP receptor antagonists.)

SUMMARY OF THE INVENTION

This invention provides compounds, that areN-alkyl-2-(1-(2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamides,e.g.N-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamideswherein the 5 substituent is selected from the group consisting of haloand alkyloxy radicals.

Some embodiments of the invention are described in the followingparagraphs:

1. A compound, that is aN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamidewherein the 5 substituent is selected from the group consisting of haloand alkyloxy radicals.2. The compound of paragraph 1 wherein said alkyl radical is a n-alkylradical.3. The compound of paragraph 2 wherein said n-alkyl radical comprisesfrom 5 to 10 carbon atoms.4. The compound of paragraphs 1-3 wherein said n-alkyl radical is octyl.5. The compound of paragraphs 1-2 wherein said alkyl radical is acycloalkyl radical.6. The compound of paragraph 5 wherein said cycloalkyl radical is acyclohexyl-n-alkyl radical.7. The compound of paragraphs 5-6 wherein said cyclohexyl-n-alkylradical is cyclohexylbutyl.8. The compound of paragraph 1 wherein the 5-substituent is selectedfrom the group consisting of fluoro and chloro.9. The compound of paragraph 1 wherein said alkyloxy is selected fromthe group consisting of methyloxy and dioxol.10. A compound, that is selected from the group consisting ofN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid and alkyl esters thereof, wherein the substituent is selected fromthe group consisting of halo and alkyloxy radicals.11. The compound of paragraphs 1-10 wherein said compound is selectedfrom the group consisting of

-   (S)—N-(4-cyclohexylbutyl)-2-(1-(5-fluoro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,-   (S)—N-(4-cyclohexylbutyl)-2-(1-(5-methoxy-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,-   (S)—N-(4-cyclohexylbutyl)-2-(1-(5-chloro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,-   N-(4-cyclohexylbutyl)-2-(1-{[6-(3-oxo{[(trifluoromethylsulfonamido)propyl)-1,3-benzodioxol-5-yl]methyl}pyrrolidin-2-yl)-1,3-oxazole-4-carboxamide    and-   2-{1-[5-fluoro-2-(3-oxo-3-{[(trifluoromethyl)sulfonyl]amino}propyl)benzyl]pyrrolidin-2-yl}-N-octyl-1,3-oxazole-4-carboxamide.    12. A compound having the following formula:

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkyl,R₂ is selected from the group consisting of H, alkyl, halogen, OR₇ andOC(R₇)₂O; andR₃ is selected from the group consisting of H and alkyl; providedhowever, when R₁ is CO₂R₇, R₂ is not H.13. The compound of paragraph 12 wherein R₂ is selected from the groupconsisting of F, Cl, OCH₃ and O(CH₂)O.14. The compound of paragraph 12 wherein R₃ is alkyl.15. The compound of paragraphs 12-13 wherein, R₃ is (CH₂)_(n)CH₂R₇,wherein n is an integer of from 4 to 9 and R₇ is H or cyclohexyl.16. The compound of paragraph 12 wherein, R₇ is selected from the groupconsisting of methyl, ethyl, i-propyl, trifluoromethyl and cyclopropyl.17. The compound of paragraph 12 wherein, R₁ is NHSO₂R₇.18. The compound of paragraph 17 wherein, R₇ is selected from the groupconsisting of methyl, ethyl, i-propyl, trifluoromethyl and cyclopropyl.19. The compound of paragraphs 12 and 17 wherein R2 is selected from thegroup consisting of F, Cl, OCH₃ and O(CH₂)O.20. The compound of paragraphs 12 and 17 wherein, R₃ is (CH₂)_(n)CH₂R₇,wherein n is an integer of from 4 to 9 and R₇ is H or cyclohexyl21. A method of making anN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamidewhich comprises reacting the corresponding3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid with cyanuric acid and trifluoromethanesulfonamide to yield saidN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide.22. The method of paragraph 21 wherein said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid is made by hydrolyzing the corresponding propionic alkyl ester,i.e.3-(2-{2R-[4-(4-Alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid alkyl ester to yield said3-(2-{2R-[4-(4-Alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid.23. The method of paragraph 22 wherein said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid alkyl ester is made by reacting the corresponding aldehyde andproline, i.e. 2R-Pyrrolidin-2-yl-oxazole-4-carboxylic acid alkylamide isreacted with 3-(4-substituted-2-formyl-phenyl)-propionic acid alkylester to yield said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid alkyl ester.24. A method according to any of paragraphs 21, 22 or 23 wherein thephenyl substituent is selected from the group consisting of fluoro,chloro, methoxy and dioxol.25. A method according to any of paragraphs 21, 22 or 23 wherein saidN-alkyl is selected from the group consisting of octyl andcyclohexylbutyl.26. A method according to any of paragraphs 21, 22 or 23 wherein saidpropionic acid alkyl ester is propionic acid methyl ester.27. A method according to paragraph 26 wherein said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid is reacted with cyanuric acid in the presence of pyridine atreflux, the resulting reaction mixture cooled to room temperature,diluted with ethyl acetate and water to separate a crude organic productand said crude organic product is dissolved in CH₂Cl₂ and DMAP,trifluoromethanesulfonamide is added and the resulting mixture isstirred at room temperature under nitrogen to yield saidN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide.28. A method comprising administering a compound having the followingformula:

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkylR₂ is selected from the group consisting of H, alkyl, halogen, OR₇ andOC(R₇)₂O; andR₃ is selected from the group consisting of H and alkyl; providedhowever, when R₁ is

CO₂R₇, R₂ is not H.

The method of paragraph 28 wherein said compound is administered totreat DP₁, FP, EP₁, EP₃, TP and/or EP₄ receptor mediated diseases orconditions.

30. A method comprising administering a compound to treat DP₁, FP, EP₁,EP₃, TP and/or EP₄ receptor mediated diseases or conditions wherein saidcompound has the following formula:

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkylR₂ is selected from the group consisting of H, alkyl, halogen, OR₇ andOC(R₇)₂O; andR₃ is selected from the group consisting of H and alkyl.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the reaction scheme for the preparation of certainintermediate aldehyde compounds that are useful in preparing compoundsof this invention; and,

FIG. 2 shows the reaction scheme for the preparation of compounds ofthis invention from the reaction product of the aldehydes of FIG. 1 anda proline compound.

DETAILED DESCRIPTION OF THE INVENTION

The following terms are used to define the disclosed invention.

“Alkyl” refers to a straight-chain, branched or cyclic saturatedaliphatic hydrocarbon. Preferably, the alkyl group has 1 to 12 carbons.More preferably, it is an alkyl of from 4 to 10 carbons, most preferably4 to 8 carbons. Typical alkyl groups include methyl, ethyl, propyl,isopropyl, butyl, isobutyl, tertiary butyl, pentyl, hexyl and the like.The alkyl group may be optionally substituted with one or moresubstituents are selected from the group consisting of hydroxyl, cyano,alkoxy, ═O, ═S, NO₂, halogen, dimethyl amino, and SH.

“Cycloalkyl” refers to a cyclic saturated aliphatic hydrocarbon group.Preferably, the cycloalkyl group has 3 to 12 carbons. More preferably,it has from 4 to 7 carbons, most preferably 5 or 6 carbons.

“Aryl” refers to an aromatic group which has at least one ring having aconjugated pi electron system and includes carbocyclic aryl,heterocyclic aryl and biaryl groups. The aryl group may be optionallysubstituted with one or more substituents selected from the groupconsisting of alkyl, hydroxyl, halogen, COOR⁶, NO₂, CF₃, N(R⁶)₂,CON(R⁶)₂, SR⁶, sulfoxy, sulfone, CN and OR⁶, wherein R⁶ is alkyl.

“Carbocyclic aryl” refers to an aryl group wherein the ring atoms arecarbon.

“Heteroaryl” refers to an aryl group having from 1 to 3 heteroatoms asring atoms, the remainder of the ring atoms being carbon. Heteroatomsinclude oxygen, sulfur, and nitrogen. Thus, heterocyclic aryl groupsinclude furanyl, thienyl, pyridyl, pyrrolyl, N-lower alkyl pyrrolo,pyrimidyl, pyrazinyl, imidazolyl and the like. Preferably, theheteroaryl group has from 2 to 10 carbons. More preferably, it has from3 to 10 carbons, most preferably 3 carbons.

The invention further relates to pharmaceutical compositions containingthe above compounds in combination with a pharmaceutically-acceptableexcipient and to their use in medicine, in particular their use in thetreatment of conditions mediated by the action of ligands for the DP₁,FP, EP₁, EP₃ and EP₄ prostaglandin (PG) receptors. The compounds of thisinvention are also useful for treating conditions mediated by the actionof ligands for the thromboxane (TP) receptor.

The present invention provides compounds having the general formula:

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkyl, e.g. fluoro or fluoroalkyl;R₂ is selected from the group consisting of H, alkyl, halogen, OR₇ andOC(R₇)₂O;R₃ is selected from the group consisting of H and alkyl; providedhowever, when R₁ is CO₂R₇, R₂ is not H;

Preferably, R₁ is selected from the group consisting of CO₂H, CO₂C₃H₇and NHSO₂R₇. More preferably R₁ is NHSO₂R₇;

Preferably, R₇ is selected from the group consisting of methyl, ethyl,i-propyl, trifluoromethyl and cyclopropyl;

Preferably, R₂ is selected from the group consisting of F, Cl, CH₃O,OCH₂O and H; and,

Preferably, R₃ is (CH₂)_(n)CH₂R₇, wherein n is an integer of from 4 to 9and R₇ is H or cyclohexyl.

The most preferred compounds of the present invention are selected fromthe group consisting of:

-   (S)—N-(4-cyclohexylbutyl)-2-(1-(5-fluoro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide;-   (S)—N-(4-cyclohexylbutyl)-2-(1-(5-methoxy-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide;-   (S)—N-(4-cyclohexylbutyl)-2-(1-(5-chloro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide;-   N-(4-cyclohexylbutyl)-2-(1-{[6-(3-oxo{[(trifluoromethylsulfonamido)propyl)-1,3-benzodioxol-5-yl]methyl}pyrrolidin-2-yl)-1,3-oxazole-4-carboxamide;    and,-   2-{1-[5-fluoro-2-(3-oxo-3-{[(trifluoromethyl)sulfonyl]amino}propyl)benzyl]pyrrolidin-2-yl}-N-octyl-1,3-oxazole-4-carboxamide.

Certain of the compounds of the present invention may be preparedaccording to methods for preparing similar compounds—albeit compoundsthat are reported as thromboxane A 2 receptor antagonists or thromboxaneA 2 synthetase inhibitors—as set forth in U.S. Pat. No. 5,280,034, whichis hereby incorporated by reference. As shown in FIGS. 1 and 2,preferably, certain of the preferred compounds of the present inventionare prepared by a method of making anN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamidewhich comprises reacting the corresponding3-(2-{2R-[4-(4-Alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid with cyanuric acid and trifluoromethanesulfonamide to yield saidN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide.In the above method, said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid may be reacted with cyanuric acid in the presence of pyridine, orother suitable base, at reflux, the resulting reaction mixture cooled toroom temperature, diluted to separate out the organic product,preferably with ethyl acetate and water and said crude organic productis dissolved in CH₂Cl₂ and DMAP, trifluoromethanesulfonamide is addedand the resulting mixture is stirred at room temperature under nitrogenor other inert gas to yield saidN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide.

Said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid may be made by hydrolyzing the corresponding propionic alkyl ester,i.e.3-(2-{2R-[4-(4-Alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid alkyl ester to yield said3-(2-{2R-[4-(4-Alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid.

Said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid alkyl ester is made by reacting the corresponding aldehyde andproline, i.e. 2R-Pyrrolidin-2-yl-oxazole-4-carboxylic acid alkylamidemay be reacted with 3-(4-substituted-2-formyl-phenyl)-propionic acidalkyl ester to yield said3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid alkyl ester.

Preferably, the phenyl substituent is selected from the group consistingof fluoro, chloro, methoxy and dioxol.

Preferably, said N-alkyl is selected from the group consisting of octyland cyclohexylbutyl.

Preferably, said propionic acid alkyl ester is propionic acid methylester.

The reagents and conditions used in FIGS. 1 and 2 and the Examples maybe abbreviated as follows:

Ac is acetyl or acetate;DCM is dichloromethane;TFA is trifluoroacetic acid;DBU refers to 1,8-diazabicyclo[5.4.0]undec-7-ene;DMF is dimethylformamide;Me is methyl;Et is ethyl;THF is tetrahydrofuran;DMAP is 4-dimethylaminopyridine;HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid;HMTA is hexamethylenetetramine; and,HBTU is 2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluroniumhexafluorophosphate.

The following examples are intended to illustrate the present invention.

Example 1 General Method 1

N-Phenylbis(trifluoromethanesulfinimide) (1.41 g, 3.94 mmol) was addedportion-wise to a solution of the Phenol (3.57 mmol) and triethylamine(0.56 mL, 4 mmol) in DMF (3 mL) at room temperature and under nitrogenatmosphere. The resulting mixture was stirred overnight. The reactionwas quenched with water (3 ml) and the mixture was extracted withdiethyl ether (2×10 ml). The organic layer was dried (MgSO₄), filteredand the solvent was evaporated under vacuum. The crude compound waspurified by column in a 20 g SPE cartridge using 20% CH₂Cl₂/80%iso-hexane as eluent to give the desired triflate as a black liquid(98%).

Example 1a Trifluoro-methanesulfonic acid-4-fluoro-2-formyl-phenyl ester

¹H-NMR (CDCl₃, 300 MHz): 10.26 (s, 1H, CHO), 7.69 (m, 1H, ArH), 7.45 (m,2H, ArH). ¹⁹F-NMR (CDCl₃, 300 MHz) γ −73.1, −110

Example 1b Trifluoro-methanesulfonic acid-4-Chloro-2-formyl

¹H-NMR (CDCl₃, 300 MHz): 10.22 (s, 1H, CHO), 7.95 (d, 1H, J=2.6 Hz,ArH), 7.68 (dd, 1H, J=2.6, 8.6 Hz, ArH), 7.38 (d, 1H, J=8.6 Hz, ArH).¹⁹F-NMR (CDCl₃, 300 MHz) −73.2

Example 1c Trifluoro-methanesulfonic acid-4-methoxy-2-formyl

¹H-NMR (CDCl₃, 300 MHz): 10.26 (s, 1H, CHO), 7.29 (m, 3H, ArH), 3.90 (s,3H, —OCH₃). ¹⁹F-NMR (CDCl₃, 300 MHz) −73.2

Example 2 General Method 2

A mixture of the triflate (from General method 1) (3.37 mmol), methylacrylate (0.70 ml), triethylamine (0.9 ml, 6.8 mmol) and Pd(dppf)₂Cl₂(0.026 g) in THF (10 ml) was heated at reflux for 16 h under a nitrogenatmosphere. Water (10 ml) was added and the compound was extracted withether (3×10 ml). The combined ether layers were washed with brine (10ml), dried (MgSO4) and then evaporated to dryness under vacuum.

Then the crude compound was purified by column in a 25 G Silicacartridge using 30% EtOAc/70% iso-hexane as eluent to give theconjugated ester as a light brown solid (41%).

Example 2a (E)-3-(4-Fluoro-2-formyl-phenyl)-acrylic acid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 10.30 (s, 1H, CHO), 8.43 (d, 1H, J=15.9 Hz,—CH═CH—CO₂CH₃), 7.61 (m, 2H, ArH), 7.34 (m, 1H, ArH), 6.37 (d, 1H,J=15.9 Hz, —CH═CH—CO₂CH₃), 3.85 (s, 3H, —CO₂CH₃). ¹⁹F-NMR (CDCl₃, 300MHz) δ −110

Example 2b (E)-3-(4-Chloro-2-formyl-phenyl)-acrylic acid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 10.25 (s, 1H, CHO), 8.41 (d, 1H, J=15.9 Hz,—CH═CH—CO₂CH₃), 7.84 (s, 1H, ArH), 7.88 (s, 2H, ArH), 6.37 (d, 1H,J=15.9 Hz, —CH═CH—CO₂CH₃), 3.82 (s, 3H, —CO₂CH₃).

Example 2c (E)-3-(4-Methoxy-2-formyl-phenyl)-acrylic acid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 10.35 (s, 1H, CHO), 8.47 (d, 1H, J=15.9 Hz,—CH═CH—CO₂CH₃), 7.61 (d, 1H, J=8.6 Hz, ArH), 7.39 (s, 1H, ArH), 7.16 (m,1H, ArH), 6.33 (d, 1H, J=15.9 Hz, —CH═CH—CO₂CH₃), 3.91 (s, 3H, —OCH₃),3.83 (s, 3H, —CO₂CH₃).

Example 2d (E)-3-(6-Formyl-benzo[1,3]dioxol-5-yl)-acrylic acid methylester

This derivative was prepared following general method 2 but startingfrom the commercially available aromatic bromide

¹H-NMR (CDCl₃, 300 MHz): 10.27 (s, 1H, CHO), 8.45 (d, 1H, J=15.9 Hz,—CH═CH—CO₂CH₃), 7.37 (s, 1H, ArH), 7.07 (s, 1H, ArH), 6.33 (d, 1H,J=15.9 Hz, —CH═CH—CO₂CH₃), 612 (s, 2H, —OCH₂O—), 3.85 (s, 3H, —CO₂CH₃).

Example 3 General Method 3

The unsaturated methyl ester (from General method 2) (0.3 mmol) wasdissolved in a mixture of THF (2 mL) and MeOH (4 ml). Palladium onAlumina catalyst (35 mg) was added and the suspension was stirred for1.5 h at room temperature under a hydrogen atmosphere. The catalyst wasremoved by filtration through Hyflo and the filtrate was evaporatedunder vacuum to give a yellow solid (70%).

Example 3a 3-(4-Fluoro-2-formyl-phenyl)-propionic acid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 10.30 (s, 1H, CHO), 7.61 (m, 2H, ArH), 7.34 (m,1H, ArH), 3.85 (s, 3H, —CO₂CH₃), 2.88 (m, 2H, ArCH₂CH₂CO₂Me), 2.63 (m,2H, ArCH₂CH₂CO₂Me). ¹⁹F-NMR (CDCl₃, 300 MHz) δ −110

Example 3b 3-(4-Chloro-2-formyl-phenyl)-propionic acid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 10.25 (s, 1H, CHO), 7.84 (s, 1H, ArH), 7.88 (s,2H, ArH), 3.82 (s, 3H, —CO₂CH₃), 2.87 (m, 2H, ArCH₂CH₂CO₂Me), 2.59 (m,2H, ArCH₂CH₂CO₂Me).

Example 3c 3-(4-Methoxy-2-formyl-phenyl)-propionic acid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 10.35 (s, 1H, CHO), 7.61 (d, 1H, J=8.6 Hz,ArH), 7.39 (s, 1H, ArH), 7.16 (m, 1H, ArH), 3.91 (s, 3H, —OCH₃), 3.83(s, 3H, —CO₂CH₃), 2.92 (m, 2H, ArCH₂CH₂CO₂Me), 2.61 (m, 2H,ArCH₂CH₂CO₂Me).

Example 3d 3-(6-Formyl-benzo[1,3]dioxol-5-yl)-propionic acid methylester

¹H-NMR (CDCl₃, 300 MHz): 10.27 (s, 1H, CHO), 7.37 (s, 1H, ArH), 7.07 (s,1H, ArH), 612 (s, 2H, —OCH₂O—), 3.85 (s, 3H, —CO₂CH₃), 2.93 (m, 2H,ArCH₂CH₂CO₂Me), 2.63 (m, 2H, ArCH₂CH₂CO₂Me).

Example 4 General Method 4

A solution of Z-protected-L-Serine (5 g, 20.9 mmol), amine (25.1 mmol),WSC (6 g, 31.4 mmol), N-methylmorpholine (2.55 ml, 23 mmol) in DMF (150ml) was stirred at room temperature for 16 h under a nitrogenatmosphere.

The reaction mixture was evaporated to dryness under vacuum and theresidue was re-dissolved in EtOAc (100 ml). This solution was washedwith 2M solution of HCl (2×75 mL), sat. Solution of sodium bicarbonate(2×75 mL), brine (2×75 mL) and dried (Na₂SO₄). The solvent wasevaporated to give the Z-protected serine amide as a white solid (64%).

Example 4a (2-Hydroxy-1-octylcarbamoyl-ethyl)-carbamic-acid benzyl ester

¹H-NMR (CDCl₃, 300 MHz): 7.37 (m, 5H, ArH), 6.56 (m, 1H, NH), 5.83 (m,1H, NH), 5.15 (s, 2H, ArCH₂—), 4.16 (m, 2H, CH₂OH), 3.67 (m, 1H,NHCHCO), 3.24 (m, 2H, CONHCH₂—), 1.49 (m, 2H, NHCH₂—CH₂—), 1.27 (m, 10H,—CH₂—CH₂—), 0.89 (m, 3H, —CH₃)

Example 5 General Method 5

The Z-protected serinamide (from General method 4) (0.98 mmol) wasdissolved in a mixture of THF (25 ml) and MeOH (18 ml). Then Pd(OH)₂ (52mg) was added and the reaction mixture was stirred for 16 h at roomtemperature under a hydrogen atmosphere. The palladium hydroxide wasremoved by filtration through Hyflo and the filtrate was evaporatedunder vacuum to give the free serine amide as a yellow solid (98%).

Example 5a 2-Amino-3-hydroxy-N-octyl-propionamide

¹H-NMR (CDCl₃, 300 MHz): 3.84-3.73 (m, 2H, CH₂OH), 3.47 (m, 1H, NHCHCO),3.26 (m, 2H, CONHCH₂—), 2.49 (bs, 2H, NH₂), 1.52 (m, 2H, NHCH₂—CH₂—),1.29 (m, 10H, —CH₂—CH₂—), 0.89 (m, 3H, —CH₃)

Example 6 General Method 6

To a solution N-benzyloxicarbonyl-L-proline (14.86 mmol) and free serineamide (from General method 5) (16.35 mmol) in dimethylformamide (150 ml)under a nitrogen atmosphere, N-methylmorpholine (3.6 mL, 32.7 mmol) wasadded, followed by HBTU (6.2 g, 16.35 mmol). The resulting mixture wasstirred at room temperature for 16 h.

After this time the solution was concentrated under vacuum and theresidue was dissolved in ethyl acetate (100 mL). The solution was washedwith 2M HCl solution (100 mL), a saturated solution of NaHCO₃ (100 mL)and dried over MgSO₄. Filtration and concentrated under vacuum yield thedesired compound as a thick oil.

Example 6a2R-(2-Hydroxy-1-octylcarbamoyl-ethylcarbamoyl)-pyrrolidine-1-carboxylicacid benzyl ester

¹H-NMR (CDCl₃, 300 MHz): 7.35 (m, 5H, ArH), 5.15 (s, 2H, ArCH₂—), 4.48(m, 1H, NCHCONH), 4.33 (m, 2H, CH₂OH), 4.07 (m, 1H, NHCHCO), 3.59 (m,2H, CH₂NCO), 3.19 (m, 2H, CONHCH₂—), 2.20 (m, 2H, —CH₂—CH₂—), 1.94 (m,2H, —CH₂—CH₂—), 1.49 (m, 2H, NHCH₂—CH₂—), 1.27 (m, 10H, —CH₂—CH₂—), 0.88(m, 3H, —CH₃)

Example 7 General Method 7

To a solution of amide (from general method 6) (14.86 mmol) indichloromethane (200 ml), at −25° C. under a nitrogen atmosphere, 40%solution of deoxo-fluor (17.09 mmol) was added and the resulting mixturewas stirred at room temperature for 2.5 h.

After this time, a saturated solution of NaHCO₃ (200 mL) was added andthe mixture was diluted with more CH₂Cl₂ (100 mL). The organic layer wasseparated, then washed with saturated brine (150 mL), and dried overMgSO₄. Filtration and concentrated in vacuo yielded the crude compoundas a thick oil.

The residue was purified by column chromatography on silica using asolvent gradient starting from ethyl acetate/iso-hexane 1:1 to ethylacetate/methanol 9:1, to isolate the title compound as a thick oil (72%)

Example 7a2R-(4-Octylcarbamoyl-4,5-dihydro-oxazol-2-yl)-pyrrolidine-1-carboxylicacid benzyl ester

¹H-NMR (CDCl₃, 300 MHz): 7.37 (m, 5H, ArH), 5.12 (s, 2H, ArCH₂—),4.70-4.30 (m, 4H, NCHCONH+CH₂O—+NHCHCO), 3.55 (m, 2H, CH₂NCO), 3.22 (m,2H, CONHCH₂—), 2.22 (m, 1H, —CH₂—CH₂—), 2.05 (m, 3H, —CH₂—CH₂—), 1.53(m, 2H, NHCH₂—CH₂—), 1.26 (m, 10H, —CH₂—CH₂—), 0.88 (m, 3H, —CH₃)

Example 8 General Method 8

To a suspension of copper bromide (7.48 mmol) in degasseddichloromethane (21 mL), under nitrogen atmosphere and in a water bath,was added HMTA (7.48 mmol) followed by DBU (7.48 mmol) and the resultingmixture was stirred for 15 minutes. Then, a solution of oxazolidine(from general method 7) (1.87 mmol) in dichloromethane (11 ml) was addedand the resulting mixture was stirred at room temperature for 16 h.

After this time, the solution was concentrated under vacuum and theresidue was partitioned between ethyl acetate (30 mL) and a 1:1 sat.solution of NH₄Cl and NH₃ (30 mL). Then, the organic layer was separatedand washed with Brine (30 mL), and dried over MgSO₄. Filtration andconcentrated in vacuo yield the crude compound as a thick oil. Theresidue was purified by column chromatography on a 10 g silica SPE usingethyl acetate/iso-hexane 40%:60% to isolate the title compound as ayellow solid (80%)

Example 8a 2R-(4-Octylcarbamoyl-oxazol-2-yl)-pyrrolidine-1-carboxylicacid benzyl ester

¹H-NMR (CDCl₃, 300 MHz): 8.10 (s, 1H, ═CH), 8.01 (s, 1H, ═CH), 7.37 (m,7H, ArH), 7.13 (m, 3H, ArH), 6.88-6.79 (m, 2H, NH), 5.21-4.95 (m, 8H,NCHCONH+PhCH₂O—+NHCHCO), 3.70 (m, 4H, CH₂NCO), 3.59 (m, 4H, CONHCH₂—),2.30 (m, 2H, —CH₂—CH₂—), 2.06 (m, 6H, —CH₂—CH₂—), 1.61 (m, 4H,NHCH₂—CH₂—), 1.29 (m, 20H, —CH₂—CH₂—), 0.88 (m, 6H, —CH₃)

Example 9 General Method 9

The Z-protected oxazole (from general method 8) (0.98 mmol) wasdissolved in MeOH (25 ml) then Pd(OH)₂ (52 mg) was added and thesuspension was stirred overnight at room temperature under hydrogen. Thepalladium hydroxide was removed by filtration through Hyflo and thefiltrate was evaporated under vacuum to give a yellow solid (95%).

Example 9a 2R-Pyrrolidin-2-yl-oxazole-4-carboxylic acid octylamide

¹H-NMR (CDCl₃, 300 MHz): 8.15 (s, 1H, ═CH), 7.03 (m, 1H, NH), 4.46 (m,1H, NCH-Oxazole), 3.39 (dd, 2H, J=7, 14 Hz, CONHCH₂—), 3.24 (m, 2H,—CH₂N—), 2.30-1.88 (m, 4H, —CH₂—CH₂—), 1.59 (m, 2H, NHCH₂—CH₂—), 1.28(m, 10H, —CH₂—CH₂—), 0.88 (m, 3H, —CH₃)

General Method 10

To a solution of aldehyde (from general method 3) (1.49 mmol) and freeproline (from general method 9) (1.24 mmol) in CH₂Cl₂ (15 mL) was addedsodium triacetoxyborohydride (0.369 g, 1.74 mmol). The mixture wasstirred under a nitrogen atmosphere for 16 hours at room temperature.

The mixture was diluted with 15 mL of CH₂Cl₂ and water was added. Theorganic layer was separated, washed with saturated brine (30 mL), dried(Na₂SO₄) and the solvent was evaporated to give required product as ayellow solid (85%).

Example 10a3-(2-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-fluoro-phenyl)-propionicacid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 8.13 (s, 1H, ═CH), 7.55 (dd, 1H, J=5.5, 8.4 Hz,ArH), 7.17 (m, 1H, NH), 7.05 (dd, 1H, J=2.6, 9.5 Hz, ArH), 6.96 (dt, 1H,J=2.6, 8.4, ArH), 4.03 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.81 (s, 3H,—CO₂CH₃), 3.76 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.53 (d, 1H, J=11.9 Hz,—NCH₂Ar), 3.41 (dd, 2H, J=7, 14 Hz, CONHCH₂—), 3.10 (m, 2H,ArCH₂CH₂CO₂Me), 3.00 (m, 1H, —CH₂N—), 2.70 (m, 2H, ArCH₂CH₂CO₂Me), 2.40(m, 1H, —CH₂N—), 2.69-1.85 (m, 4H, —CH₂—CH₂—), 1.71-1.55 (m, 9H,NHCH₂—CH₂—), 1.36 (m, 2H, —CH₂—CH₂—), 1.25-1.19 (m, 6H, —CH₂—CH₂—).¹⁹F-NMR (CDCl₃, 300 MHz) δ −111

Example 10b3-(2-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-chloro-phenyl)-propionicacid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 8.18 (d, 1H, J=15.9 Hz, —CH═CH—CO₂Me), 8.12 (s,1H, ═CH), 7.47 (m, 1H, ArH), 7.29 (m, 1H, ArH), 7.22 (m, 2H, ArH+NH),6.31 (d, 1H, J=15.9 Hz, —CH═CH—CO₂Me), 3.97 (d, 1H, J=11.9 Hz, —NCH₂Ar),3.80 (s, 3H, —CO₂CH₃), 3.73 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.52 (d, 1H,J=11.9 Hz, —NCH₂Ar), 3.40 (dd, 2H, J=7, 14 Hz, CONHCH₂—), 3.05 (m, 2H,ArCH₂CH₂CO₂Me), 2.99 (m, 1H, —CH₂N—), 2.71 (m, 2H, ArCH₂CH₂CO₂Me), 2.41(m, 1H, —CH₂N—), 2.69-1.85 (m, 4H, —CH₂—CH₂—), 1.71-1.55 (m, 9H,NHCH₂—CH₂—), 1.36 (m, 2H, —CH₂—CH₂—), 1.25-1.19 (m, 6H, —CH₂—CH₂—).

Example 10c3-(2-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-methoxy-phenyl)-propionicacid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 8.23 (d, 1H, J=15.9 Hz, —CH═CH—CO₂Me), 8.14 (s,1H, ═CH), 7.55 (d, 1H, J=8.4 Hz, ArH), 7.24 (m, 1H, NH), 6.82 (m, 2H,ArH), 6.27 (d, 1H, J=15.9 Hz, —CH═CH—CO₂Me), 4.02 (d, 1H, J=11.9 Hz,—NCH₂Ar), 3.82 (s, 3H, Ar—OCH₃), 3.80 (s, 3H, —CO₂CH₃), 3.72 (t, 1H,J=7.7 Hz, NCH-Oxazole), 3.50 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.41 (dd, 2H,J=7, 14 Hz, CONHCH₂—), 3.15 (m, 2H, ArCH₂CH₂CO₂Me), 2.99 (m, 1H,—CH₂N—), 2.70 (m, 2H, ArCH₂CH₂CO₂Me), 2.41 (c, 1H, J=8.6 Hz, —CH₂N—),2.69-1.85 (m, 4H, —CH₂—CH₂—), 1.71-1.55 (m, 9H, NHCH₂—CH₂—), 1.36 (m,2H, —CH₂—CH₂—), 1.25-1.19 (m, 6H, —CH₂—CH₂—).

Example 10d3-(6-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-benzo[1,3]dioxol-5-yl)-propionicacid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 8.18 (d, 1H, J=15.9 Hz, —CH═CH—CO₂Me), 8.16 (s,1H, ═CH), 7.28 (m, 1H, NH), 7.04 (s, 1H, ArH), 6.76 (s, 1H, ArH), 6.21(d, 1H, J=15.9 Hz, —CH═CH—CO₂Me), 5.96 (s, 2H, —OCH₂O—), 3.96 (d, 1H,J=11.9 Hz, —NCH₂Ar), 3.72 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.43 (d, 1H,J=11.9 Hz, —NCH₂Ar), 3.40 (dd, 2H, J=7, 14 Hz, CONHCH₂—), 2.96 (m, 1H,—CH₂N—), 2.85 (m, 2H, ArCH₂CH₂CO₂Me), 2.69 (m, 2H, ArCH₂CH₂CO₂Me), 2.37(c, 1H, J=8.6 Hz, —CH₂N—), 2.69-1.85 (m, 4H, —CH₂—CH₂—), 1.71-1.55 (m,9H, NHCH₂—CH₂—), 1.36 (m, 2H, —CH₂—CH₂—), 1.25-1.19 (m, 6H, —CH₂—CH₂—).

Example 10e3-(2-{2R-[4-(octylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-fluoro-phenyl)-propionicacid methyl ester

¹H-NMR (CDCl₃, 300 MHz): 8.09 (s, 1H, ═CH), 7.08 (dd, 1H, J=5.5, 8.4 Hz,ArH), 7.01 (m, 1H, NH), 6.98 (dd, 1H, J=2.6, 9.5 Hz, ArH), 6.97 (dt, 1H,J=2.6, 8.4, ArH), 3.88 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.76 (t, 1H, J=7.7Hz, NCH-Oxazole), 3.68 (s, 3H, —CO₂CH₃), 3.42 (d, 1H, J=11.9 Hz,—NCH₂Ar), 3.41 (dd, 2H, J=7, 14 Hz, CONHCH₂—), 3.10 (m, 2H,ArCH₂CH₂CO₂Me), 3.00 (m, 2H, —CH₂N—), 2.70 (m, 2H, ArCH₂CH₂CO₂Me),2.69-1.85 (m, 4H, —CH₂—CH₂—), 1.71-1.55 (m, 2H, NHCH₂—CH₂—), 1.36 (m,2H, —CH₂—CH₂—), 1.25-1.19 (m, 8H, —CH₂—CH₂—), 0.89 (m, 3H, —CH₃).¹⁹F-NMR (CDCl₃, 300 MHz) δ −111

Example 11 General Method 11

The ester (from general method 10) (1.82 mmol) was dissolved in THF (20mL) and a solution of LiOH (0.302 g, 7.3 mmol) in water (10 mL) wasadded. The resulting mixture was heated at 60° C. for 16 h.

Then, EtOAc was added (10 ml) and the solution was neutralized with a 2Msolution of HCl. The organic layer was separated, washed with brine (10mL) and dried (Na₂SO₄). The mixture was filtered and the solvent wasevaporated to give crude product.

The compound was purified by column chromatography on a 10 g SPEcartridge, using as eluent: 2% MeOH/98% CH₂Cl₂, to give the carboxylicacid as a white solid (70%).

Example 11a3-(2-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-fluoro-phenyl)-propionicacid

¹H-NMR (CDCl₃, 300 MHz): 8.18 (s, 1H, ═CH), 7.10 (m, 2H, ArH+NH), 6.97(m, 1H, ArH), 6.88 (m, 1H, ArH), 3.90 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.77(t, 1H, J=7.7 Hz, NCH-Oxazole), 3.40 (m, 3H, —NCH₂Ar+CONHCH₂—), 2.99 (m,1H, —CH₂N—), 2.88 (m, 2H, ArCH₂CH₂CO₂H), 2.59 (m, 2H, ArCH₂CH₂CO₂H),2.41 (m, 1H, —CH₂N—), 2.24-1.90 (m, 4H, —CH₂—CH₂—), 1.60 (m, 2H,NHCH₂—CH₂—), 1.27 (m, 10H, —CH₂—CH₂—), 0.88 (m, 5H, —CH₂—CH₂—). ¹⁹F-NMR(CDCl₃, 300 MHz) δ −111

Example 11b3-(2-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-chloro-phenyl)-propionicacid

¹H-NMR (CDCl₃, 300 MHz): 8.16 (s, 1H, ═CH), 7.19 (m, 2H, ArH), 7.09 (d,1H, J=8.4 Hz, ArH), 7.02 (m, 1H, NH), 3.91 (d, 1H, J=11.9 Hz, —NCH₂Ar),3.76 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.40 (m, 3H, —NCH₂Ar+CONHCH₂—),3.00 (m, 1H, —CH₂N—), 2.87 (m, 2H, ArCH₂CH₂CO₂H), 2.60 (m, 2H,ArCH₂CH₂CO₂H), 2.41 (m, 1H, —CH₂N—), 2.24-1.90 (m, 4H, —CH₂—CH₂—), 1.60(m, 2H, NHCH₂—CH₂—), 1.27 (m, 10H, —CH₂—CH₂—), 0.88 (m, 5H, —CH₂—CH₂—).

Example 11c3-(2-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-methoxy-phenyl)-propionicacid

¹H-NMR (CDCl₃, 300 MHz): 8.18 (s, 1H, ═CH), 7.07 (m, 2H, ArH+NH), 6.77(m, 2H, ArH), 3.91 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.77 (s, 3H, ArOCH₃),3.77 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.38 (m, 3H, —NCH₂Ar+CONHCH₂—),3.00 (m, 1H, —CH₂N—), 2.85 (m, 2H, ArCH₂CH₂CO₂H), 2.59 (m, 2H,ArCH₂CH₂CO₂H), 2.41 (m, 1H, —CH₂N—), 2.24-1.90 (m, 4H, —CH₂—CH₂—), 1.60(m, 2H, NHCH₂—CH₂—), 1.27 (m, 10H, —CH₂—CH₂—), 0.88 (m, 5H, —CH₂—CH₂—).

Example 11c3-(6-{2R-[4-(4-Cyclohexyl-butylcarbamoyl)-oxazol-2-yl]pyrrolidin-1-ylmethyl}-benzo[1,3]dioxol-5-yl)-propionicacid

¹H-NMR (CDCl₃, 300 MHz): 8.19 (s, 1H, ═CH), 7.11 (m, 1H, NH), 6.69 (s,1H, ArH), 6.64 (s, 1H, ArH), 5.89 (s, 2H, —OCH₂O—), 3.84 (d, 1H, J=11.9Hz, —NCH₂Ar), 3.72 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.39 (dd, 2H, J=7, 14Hz, CONHCH₂—), 3.29 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.00 (m, 1H, —CH₂N—),2.79 (m, 2H, ArCH₂CH₂CO₂H), 2.60 (m, 2H, ArCH₂CH₂CO₂H), 2.38 (c, 1H,J=8.6 Hz, —CH₂N—), 2.69-1.85 (m, 4H, —CH₂—CH₂—), 1.71-1.55 (m, 9H,NHCH₂—CH₂—), 1.36 (m, 2H, —CH₂—CH₂—), 1.25-1.19 (m, 6H, —CH₂—CH₂—).

Example 11d3-(2-{2R-[4-(octylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-fluoro-phenyl)-propionicacid

¹H-NMR (CDCl₃, 300 MHz): 8.16 (s, 1H, ═CH), 7.09 (m, 2H, ArH+NH), 6.95(dd, 1H, J=2.6, 9.5 Hz, ArH), 6.82 (dt, 1H, J=2.6, 8.4, ArH), 3.85 (d,1H, J=11.9 Hz, —NCH₂Ar), 3.73 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.36 (m,3H, —NCH₂Ar+CONHCH₂—), 2.86 (m, 3H, ArCH₂CH₂CO₂Me+—CH₂N—), 2.60 (m, 2H,ArCH₂CH₂CO₂Me), 2.36 (m, 1H, —CH₂N), 2.24-1.80 (m, 4H, —CH₂—CH₂—),1.71-1.55 (m, 4H, NHCH₂—CH₂—), 1.25-1.19 (m, 8H, —CH₂—CH₂—), 0.89 (m,3H, —CH₃).

¹⁹F-NMR (CDCl₃, 300 MHz) δ −111

Example 12 General Method 12

To a solution of saturated acid (from general method 11) (0.15 mmol) inTHF (7 mL), under nitrogen atmosphere, was added pyridine (0.45 mmol)and cyanuric fluoride (1.125 mmol) and the resulting mixture wasrefluxed for 4 h. The reaction mixture was left to cool to roomtemperature, then diluted with ethyl acetate (15 mL) and water (10 mL).The organic layer was separated, washed with a saturated solution ofNaHCO₃ (10 mL), then saturated brine (10 mL), dried (MgSO₄), filteredand the solvent was evaporated under vacuum.

The crude was re-dissolved in CH₂Cl₂ (7 mL) and DMAP (0.6 mmol) andtrifluoromethanesulfonamide (0.45 mmol) were added. The resultingmixture was stirred at room temperature under nitrogen for 16 h.

After this time, the reaction mixture was diluted with more CH₂Cl₂ (15mL) and water (10 mL) was added. The organic layer was separated, washedwith a 2M solution of HCl (5 mL), then saturated brine (10 mL) and dried(MgSO₄), filtered and the solvent was evaporated under vacuum.

The residue was purified by column chromatography through a 10 g SPEsilica cartridge using a solvent gradient starting from ethyl acetate toethyl acetate/methanol 9:1, to isolate the title compound as thick oil(60%)

Example 12aS)—N-(4-cyclohexylbutyl)-2-(1-(5-fluoro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide

¹H-NMR (CDCl₃, 300 MHz): 8.27 (s, 1H, ═CH), 7.24 (m, 1H, NH), 7.05 (dd,1H, J=6, 8.4 Hz, ArH), 6.85 (m, 2H, ArH), 3.91 (d, 1H, J=11.9 Hz,—NCH₂Ar), 3.74 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.36 (m, 2H, CONHCH₂—),3.23 (d, 1H, —NCH₂Ar), 2.99 (m, 1H, —CH₂N—), 2.59 (m, 4H, ArCH₂CH₂CO₂H),2.49 (m, 1H, —CH₂N—), 2.40-2.20 (m, 4H, —CH₂—CH₂—), 1.90 (m, 2H,NHCH₂—CH₂—), 1.27 (m, 10H, —CH₂—CH₂—), 0.88 (m, 5H, —CH₂—CH₂—). ¹⁹F-NMR(CDCl₃, 300 MHz) δ −79, −118

LC-MS (M⁺+1) 631

Example 12b(S)—N-(4-cyclohexylbutyl)-2-(1-(5-chloro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide

¹H-NMR (CDCl₃, 300 MHz): 8.33 (s, 1H, ═CH), 7.15 (m, 2H, ArH), 7.04 (m,1H, ArH), 7.02 (m, 1H, NH), 4.01 (m, 2H, —NCH₂Ar+NCH-Oxazole), 3.39 (m,3H, CONHCH₂—+—NCH₂Ar), 3.15 (m, 1H, —CH₂N—), 2.70-2.46 (m, 5H,ArCH₂CH₂CONH+—CH₂N—), 2.29 (m, 2H, —CH₂—CH₂—), 2.03 (m, 2H, —CH₂—CH₂—),1.90 (m, 2H, NHCH₂—CH₂—), 1.27 (m, 10H, —CH₂—CH₂—), 0.88 (m, 5H,—CH₂—CH₂—). ¹⁹F-NMR (CDCl₃, 300 MHz) −79

LC-MS (M⁺+1) 647

Example 12c(S)—N-(4-cyclohexylbutyl)-2-(1-(5-methoxy-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide

¹H-NMR (CDCl₃, 300 MHz): 8.23 (s, 1H, ═CH), 7.06 (m, 2H, ArH), 6.75 (m,2H, ArH+NH), 3.95 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.77 (m, 4H,NCHOxazole+ArOCH₃), 3.41 (m, 2H, CONHCH₂), 3.25 (d, 1H, J=11.9 Hz,—NCH₂Ar), 3.01 (m, 1H, —CH₂N—), 2.71 (m, 3H, ArCH₂CH₂CO₂H), 2.71 (m, 3H,ArCH₂CH₂CO₂H), 2.51 (m, 1H, ArCH₂CH₂CO₂H), 2.41 (m, 1H, —CH₂N—), 2.21(m, 2H, —CH₂—CH₂—), 1.97 (m, 2H, —CH₂—CH₂—), 1.90 (m, 2H, NHCH₂—CH₂—),1.27 (m, 10H, —CH₂—CH₂—), 0.88 (m, 5H, —CH₂—CH₂—). ¹⁹F-NMR (CDCl₃, 300MHz) δ −79

LC-MS (M⁺+1) 643

Example 12dN-(4-cyclohexylbutyl)-2-(1-{[6-(3-oxo{(trifluoromethylsulfonamido)propyl)-1,3-benzodioxol-5-yl]methyl}pyrrolidin-2-yl)-1,3-oxazole-4-carboxamide

¹H-NMR (CDCl₃, 300 MHz): 8.34 (s, 1H, ═CH), 7.32 (m, 1H, NH), 6.62 (s,1H, ArH), 6.60 (s, 1H, ArH), 5.88 (s, 2H, —OCH₂O—), 3.86 (d, 1H, J=11.9Hz, —NCH₂Ar), 3.74 (t, 1H, J=7.7 Hz, NCH-Oxazole), 3.41 (m, 3H,CONHCH₂—+—NCH₂Ar), 3.05 (m, 1H, —CH₂N—), 2.38 (m, 4H, ArCH₂CH₂CO₂H),2.00 (c, 1H, J=8.6 Hz, —CH₂N—), 2.69-1.85 (m, 4H, —CH₂—CH₂—), 1.71-1.55(m, 9H, NHCH₂—CH₂—), 1.36 (m, 2H, —CH₂—CH₂—), 1.25-1.19 (m, 6H,—CH₂—CH₂—).

¹⁹F-NMR (CDCl₃, 300 MHz) δ −79.7

LC-MS (M⁺+1) 657

Example 12e2-{1-[5-fluoro-2-(3-oxo-3-{[(trifluoromethyl)sulfonyl]amino}propyl)benzyl]pyrrolidin-2-yl}-N-octyl-1,3-oxazole-4-carboxamide

¹H-NMR (CDCl₃, 300 MHz): 8.38 (s, 1H, ═CH), 7.09 (m, 1H, NH), 7.01 (m,1H, ArH), 6.84 (m, 2H, ArH), 3.92 (d, 1H, J=11.9 Hz, —NCH₂Ar), 3.76 (t,1H, J=7.7 Hz, NCH-Oxazole), 3.36 (m, 2H, CONHCH₂—), 3.17 (d, 1H, J=11.9Hz, —NCH₂Ar), 2.98 (m, 1H, —CH₂N—), 2.63-2.30 (m, 5H,ArCH₂CH₂CO₂Me+—CH₂—CH₂—+—CH₂N—), 2.19 (m, 2H, ArCH₂CH₂CO₂Me), 1.92 (m,2H, —CH₂—CH₂—), 1.25-1.19 (m, 12H, —CH₂—CH₂—), 0.89 (m, 3H, —CH₃).

¹⁹F-NMR (CDCl₃, 300 MHz) δ −79.7, −118.5

LC-MS (M⁺+1) 605

The above compounds were tested for PG antagonist activity as followsusing human recombinant prostanoid receptor (DP₁, EP₁₋₄, FP, IP and TP)stable cell lines:

In order to measure the response of G_(s) and G_(i) coupled prostanoidreceptors as a Ca²⁺ signal, chimeric G protein cDNAs were used. Stablecell lines over-expressing human prostanoid DP₁, EP₁₋₄, FP, IP, and TPreceptors were established as follows:

Briefly, human prostanoid DP₁, EP₂, and EP₄ receptor cDNAs wereco-transfected with chimeric G_(qs) cDNA containing a haemagglutanin(HA) epitope; human prostanoid EP₃ receptors were co-transfected withchimeric G_(qi)-HA; human EP₁, FP, IP, and TP receptor cDNAs wereexpressed with no exogenous G-proteins. G_(qs) and G_(qi) chimeric cDNAs(Molecular Devices, Sunnyvale, Calif., U.S.A.), as well as cDNAs ofprostanoid receptors, were cloned into a pCEP₄ vector with a hygromycinB selection marker. Transfection into HEK-293 EBNA (Epstein-Barr virusnuclear antigen) cells was achieved by the FuGENE 6 transfection Reagent(Roche Applied Science, Indianapolis, Ind., USA). Stable transfectantswere selected according to hygromycin resistance. Because G_(qs) andG_(qi) contained an HA epitope, G-protein expression was detected byWestern blotting analysis using anti-mouse HA monoclonal antibody andhorseradish peroxidase (HRP)-conjugated secondary antibody, whilefunctional expression of prostanoid receptors was detected by FLIPRscreening. These stable cell lines were validated using previouslypublished antagonists at 10 μM against serial dilutions of standardagonists by FLIPR functional assays for Ca²⁺ Signaling (as describedbelow).

Ca²⁺ signaling studies were performed using a FLIPR TETRA system(Molecular Devices, Sunnyvale, Calif., USA) in the 384-format. This is ahigh-throughput instrument for cell-based assays to monitor Ca²⁺signaling associated with GPCRs and ion channels. Cells were seeded at adensity of 5×10⁴ cells/well in BioCoat poly-D-lysine coated, black wall,clear bottom 384-well plates (BD Biosciences, Franklin lakes, NJ, USA)and allowed to attach overnight in an incubator at 37° C. The cells werethen washed twice with HBSS-HEPES buffer (Hanks' balanced salt solutionwithout bicarbonate and phenol red, 20 mM HEPES, pH 7.4) using an ELx405Select CW Microplate Washer (BioTek, Winooski, Vt., USA). After 60 minof dye-loading in the dark using the Ca²⁺-sensitive dye Fluo-4AM(Invitrogen, Carlsbad, Calif., USA), at a final concentration of2×10⁻⁶M, the plates were washed 4 times with HBSS-HEPES buffer to removeexcess dye and leaving 50 μl of buffer in each well. The plates werethen placed in the FLIPR TETRA instrument and allowed to equilibrate at37° C. AGN-211377 was added in a 25 g1 volume to each well to give finalconcentrations of 0.1 μM, 0.3 μM, 1 μM, 10 μM, and 30 μM; or 0.067 μM,0.1 μM, 0.2 μM, 0.3 μM, 0.67 μM, and 1 μM for cells over-expressing TPreceptors.

After 4.5 minutes, a 7-point serial dilution of the standard agonist forthe corresponding receptor, in a 25 μl volume was injected at the finalconcentrations from 10⁻¹¹M to 10⁻⁵M 10-fold serial dilution incrementsfor cells expressing human recombinant DP₁, EP₁, EP₂, EP₃, EP₄, FP, andIP receptors. The dose range for the standard agonist for humanrecombinant TP receptors was from 10⁻¹²M to 10⁻⁶M. HBSS-HEPES buffer wasused as the negative control for the standard agonists. Cells wereexcited with LED (light emitting diode) excitation at 470-495 nm andemission was measured through an emission filter at 515-575 nm. Assayplates were read for 3.5 minutes using the FLIPR^(TETRA). The peakincrease in fluorescence intensity was recorded for each well. On eachplate, negative controls, dose response of positive controls, andco-treatments of antagonist-agonist for each dose were in triplicates.Standard agonists were as follows: DP=BW 245C, EP₁-EP₄=PGE₂,FP=17-phenyl-PGF_(2α), IP=Cicaprost, and TP=U-46619. The peakfluorescence change in each well containing drug was expressed relativeto vehicle controls with the standard agonist at 10⁻⁶M (the positivecontrol). To obtain concentration-response curves, compounds were testedin triplicate in each plate over the desired concentration range.

Ca²⁺ Signal Studies on Human Recombinant Prostanoid Receptor DP₂

FLIPR functional assays were conducted to monitor the activityanti-asthmatic against human DP₂ receptors stably expressed in theChem-5 proprietary host cell line generated by Millipore. Prior tostandard agonist addition, the compounds were spotted at 10 μM alongwith vehicle control (1% Ethanol in HBSS-HEPES buffer) across the assaywells. The assay plate was incubated at room temperature for 10 minutesin the dark. Then an 8-point serial dilution dose response from 10⁻¹²Mto 10⁻⁵M of the standard agonist PGD₂ was performed. Assay plates wereread for 90 seconds using the FLIPR^(TETRA). The fluorescencemeasurements were collected to calculate IC₅₀ values. The assays weredone at least 3 times to give n=3.

All plates were subjected to appropriate baseline corrections. Maximumfluorescence values were exported. The raw data of n=1 was firstprocessed by Activity Base using nonlinear regression curve fit tocalculate the percentage activity of each data point relative to thepositive control (=10⁻⁶M of the standard agonist). Then n=3 of this datawere exported to

GraphPad Prism 4 to calculate the average EC₅₀ of the standard agonist,and the IC₅₀ (the concentration of the antagonist required to inhibithalf the standard agonist activity) were calculated using nonlinearregression curve fit, with constraints of bottom constant equal to 0 andtop constant equal to 100. Calculation of Kb=[AntagonistConcentration]/(IC₅₀/EC₅₀−1). When no antagonism was detected or whenKb≧10,000 nM, the antagonist is defined as not active (NA).

The results of the above testing are reported in TABLE 1, below.

TABLE 1 EC50 (nM) on Prostanoid Receptor Functional Activity Measured byFLIPR Example No FP DP EP1 EP2 EP3 EP4 IP TP 12a 350 <1 47 6400  82 38550 <1 270 17 20  830  47 10 860 <1 12b 460 <1 70 5500 100 37 9500  <112d 360  3 63 3900 150  7 1000  0.3 12e 270 18 20 2500 110 19 290 >1(FLIPR) K_(b) (nM), NA = inactive

As shown in TABLE 1, the preferred compounds of this invention are panantagonists having particular activity at the FP, DP, EP₁, EP₃, EP₄ andTP receptors, but are much less active at the EP₂ and IP receptors.Thus, these compounds have a biological selectivity profile making themuseful in treating diseases and conditions which are mediated by the FP,DP, EP₁, EP₃, EP₄ and TP receptors, without the potential side effectsand biological limitations associated with IP and EP₂ receptor blockade.Thus, the compounds of this invention compound may be administered totreat DP₁, FP, EP₁, EP₃, TP and/or EP₄ receptor mediated diseases orconditions.

For example, said condition or disease may be related to inflammation,or said DP₁, FP, EP₁, EP₃, TP and/or EP₄ receptor mediated condition ordisease may be selected from the group consisting of allergicconditions, asthma, allergic asthma, apnea, allergic conjunctivitis,allergic rhinitis, atopic dermatitis, uveitis and related disorders,atherosclerosis, blood coagulation disorders, bone disorders, cancer,cellular neoplastic transformations, chronic obstructive pulmonarydiseases and other forms of lung inflammation, pneumonia, congestiveheart failure, diabetic retinopathy, diseases or conditions requiring atreatment of anti-coagulation, diseases requiring control of boneformation and resorption, fertility disorders, pre-term labor,endometriosis glaucoma, hyperpyrexia, immune and autoimmune diseases,inflammatory conditions, metastic tumor growth, migraine, mucussecretion disorders, nasal congestion, nasal inflammation, occlusivevascular diseases, ocular hypertension, ocular hypotension,osteoporosis, rheumatoid arthritis, pain, perennial rhinitis, pulmonarycongestion, pulmonary hypotension, Raynaud's disease, rejection in organtransplant and by-pass surgery, respiratory conditions, hirsutism,rhinorrhea, shock, sleep disorders, and sleep-wake cycle disorders, overactive bladder disorders.

Said compound may be administered as a surgical adjunct in ophthalmologyfor cataract removal and artificial lens insertion, ocular implantprocedures, photorefractive radial keratotomy and other ophthalmogicallaser procedures or as a surgical adjunct in a procedure involving skinincisions, relief of pain and inflammation and scar formation/keloidspost-surgery, for treating sports injuries and general aches and painsin muscles and joints. Preferably, said DP₁, FP, EP₁, EP3, TP, and/orEP₄ receptor mediated condition or disease is an EP₁ and/or EP₄ receptormediated condition or disease.

Preferably, said DP₁, FP, EP₁, EP₃, TP and/or EP₄ receptor mediatedcondition or disease is an allergic condition, e.g. an dermatologicalallergy, or an ocular allergy, or a respiratory allergy, e.g. nasalcongestion, rhinitis, and asthma.

Said condition or disease may be related to pain.Said condition or disease may be selected from the group consisting ofarthritis, migraine, and headache.Said condition or disease may be associated with the gastrointestinaltract, wherein said condition or disease may be peptic ulcer, heartburn,reflux esophagitis, erosive esophagitis, non-ulcer dyspepsia, infectionby Helicobacter pylori, alrynitis, and irritable bowel syndrome.Said condition or disease may be selected from the group consisting ofhyperalgesia and allodynia, or said condition or disease may be relatedto mucus secretion, wherein said mucus secretion is gastrointestinal, oroccurs in the nose, sinuses, throat, or lungs.Said condition or disease is related to abdominal cramping, e.g. saidcondition or disease may be irritable bowel syndrome.Said condition or disease may be a bleeding disorder, or a sleepdisorder, or mastocytosis.Said condition or disease may be associated with elevated bodytemperature, or ocular hypertension and glaucoma, or ocular hypotension.Said condition may relate to surgical procedures to treat pain,inflammation and other unwanted sequelae wherein said surgical procedureincludes incision, laser surgery or implantation.Finally, said condition may be related to pain and inflammation andpost-surgical scar and keloid formation.

In view of the various diseases and conditions that may be treated withthe compositions of this invention there is provided a pharmaceuticalproduct comprising a compound having the following formula

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkyl, e.g. fluoro or fluoroalkyl;R₂ is selected from the group consisting of H, alkyl, halogen, OR₇ andOC(R₇)₂O; andR₃ is selected from the group consisting of H and alkyl; or apharmaceutically acceptable salt or a prodrug thereof, wherein saidproduct is packaged and labeled for the treatment or prevention of adisease or condition selected from the group consisting of uveitis,allergic conditions, asthma, allergic asthma, allergic rhinitis,atherosclerosis, blood coagulation disorders, bone disorders, cancer,cellular neoplastic transformations, chronic obstructive pulmonarydiseases and other forms of lung inflammation, congestive heart failure,diabetic retinopathy, diseases or conditions requiring a treatment ofanti-coagulation, diseases requiring control of bone formation andresorption, fertility disorders, hyperpyrexia, gangrene, glaucoma,hypothermia, immune and autoimmune diseases, inflammatory conditions,metastic tumor growth, migraine, mucus secretion disorders, nasalcongestion, nasal inflammation, occlusive vascular diseases, ocularhypertension, ocular hypotension, osteoporosis, pain, perennialrhinitis, pulmonary congestion, pulmonary hypotension, Raynaud'sdisease, rejection in organ transplant and by-pass surgery, respiratoryconditions, rheumatoid arthritis, rhinorrhea, shock, sleep disorders,sleep-wake cycle disorders, sports injuries, muscle aches and pains, andsurgical adjunct for minimizing pain, inflammation and scar/keloidformation.

Those skilled in the art will readily understand that for administrationthe compounds disclosed herein can be admixed with pharmaceuticallyacceptable excipients which, per se, are well known in the art.Specifically, a drug to be administered systemically, it may beformulated as a powder, pill, tablet or the like, or as a solution,emulsion, suspension, aerosol, syrup or elixir suitable for oral orparenteral administration or inhalation.

For solid dosage forms, non-toxic solid carriers include, but are notlimited to, pharmaceutical grades of mannitol, lactose, starch,magnesium stearate, sodium saccharin, the polyalkylene glycols, talcum,cellulose, glucose, sucrose and magnesium carbonate. The solid dosageforms may be uncoated or they may be coated by known techniques to delaydisintegration and absorption in the gastrointestinal tract and therebyprovide a sustained action over a longer period. For example, a timedelay material such as glyceryl monostearate or glyceryl distcarate maybe employed. They may also be coated by the technique described in theU.S. Pat. Nos. 4,256,108; 4,166,452; and 4,265,874 to form osmotictherapeutic tablets for control release. Liquid pharmaceuticallyadministrable dosage forms can, for example, comprise a solution orsuspension of one or more of the compounds of the present invention andoptional pharmaceutical adjutants in a carrier, such as for example,water, saline, aqueous dextrose, glycerol, ethanol and the like, tothereby form a solution or suspension. If desired, the pharmaceuticalcomposition to be administered may also contain minor amounts ofnontoxic auxiliary substances such as wetting or emulsifying agents, pHbuffering agents and the like. Typical examples of such auxiliary agentsare sodium acetate, sorbitan monolaurate, triethanolamine, sodiumacetate, triethanolamine oleate, etc. Actual methods of preparing suchdosage forms are known, or will be apparent, to those skilled in thisart; for example, see Remington's Pharmaceutical Sciences, MackPublishing Company, Easton, Pa., 16th Edition, 1980. The composition ofthe formulation to be administered, in any event, contains a quantity ofone or more of the presently useful compounds in an amount effective toprovide the desired therapeutic effect.

Parenteral administration is generally characterized by injection,either subcutaneously, intramuscularly or intravenously. Injectableformulations can be prepared in conventional forms, either as liquidsolutions or suspensions, solid forms suitable for solution orsuspension in liquid prior to injection, or as emulsions. Suitableexcipients are, for example, water, saline, dextrose, glycerol, ethanoland the like. In addition, if desired, the injectable pharmaceuticalcompositions to be administered may also contain minor amounts ofnon-toxic auxiliary substances such as wetting or emulsifying agents, pHbuffering agents and the like.

The amount of the presently useful compound or compounds of the presentinvention administered is, of course, dependent on the therapeuticeffect or effects desired, on the specific mammal being treated, on theseverity and nature of the mammal's condition, on the manner ofadministration, on the potency and pharmacodynamics of the particularcompound or compounds employed, and on the judgment of the prescribingphysician. The therapeutically effective dosage of the presently usefulcompound or compounds is preferably in the range of about 0.5 ng/kg/dayto of about 250 mg/kg/day or about 1 ng/kg/day to about 100 mg/kg/day.

For ophthalmic application, solutions are often prepared using aphysiological saline solution as a major vehicle. Ophthalmic solutionsshould preferably be maintained at a comfortable pH with an appropriatebuffer system. The formulations may also contain conventional,pharmaceutically acceptable preservatives, stabilizers and surfactants.

Preservatives that may be used in the pharmaceutical compositions of thepresent invention include, but are not limited to, benzalkoniumchloride, chlorobutanol, thimerosal, phenylmercuric acetate andphenylmercuric nitrate. A useful surfactant is, for example, Tween 80.Likewise, various useful vehicles may be used in the ophthalmicpreparations of the present invention. These vehicles include, but arenot limited to, polyvinyl alcohol, povidone, hydroxypropyl methylcellulose, poloxamers, carboxymethyl cellulose, hydroxyethyl celluloseand purified water.

Tonicity adjustors may be added as needed or convenient. They include,but are not limited to, salts, particularly sodium chloride, potassiumchloride, mannitol and glycerin, or any other suitable ophthalmicallyacceptable tonicity adjustor.

Various buffers and means for adjusting pH may be used so long as theresulting preparation is ophthalmically acceptable. Accordingly, buffersinclude acetate buffers, citrate buffers, phosphate buffers and boratebuffers. Acids or bases may be used to adjust the pH of theseformulations as needed.

Similarly, an ophthalmically acceptable antioxidant for use in thepresent invention includes, but is not limited to, sodium metabisulfite,sodium thiosulfate, acetylcysteine, butylated hydroxyanisole andbutylated hydroxytoluene.

Other excipient components which may be included in the ophthalmicpreparations are chelating agents. A useful chelating agent is edentatedisodium, although other chelating agents may also be used in place orin conjunction with it.

For topical use, creams, ointments, gels, solutions or suspensions,etc., containing the compound of the present invention are employed.Topical formulations may generally be comprised of a pharmaceuticalcarrier, cosolvent, emulsifier, penetration enhancer, preservativesystem, and emollient.

The actual dose of the compounds of the present invention depends on thespecific compound, and on the condition to be treated; the selection ofthe appropriate dose is well within the knowledge of the skilledartisan.

The present invention is not to be limited in scope by the exemplifiedembodiments, which are only intended as illustrations of specificaspects of the invention. Various modifications of the invention, inaddition to those disclosed herein, will be apparent to those skilled inthe art by a careful reading of the specification, including the claims,as originally filed. In particular, while the present invention has beenillustrated by theN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamidecompounds disclosed herein, the corresponding,3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid alkyl esters and the corresponding3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacids, e.g. the compounds of the above general formula, as well as theunsubstituted derivatives thereof, may be used in the practice of themethod of this invention.

It is intended that all such modifications will fall within the scope ofthe appended method of treatment claims and the package claims hereof

1. A compound, that is aN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamidewherein the 5 substituent is selected from the group consisting of haloand alkyloxy radicals.
 2. The compound of claim 1 wherein said alkylradical is a n-alkyl radical.
 3. The compound of claim 2 wherein saidn-alkyl radical comprises from 5 to 10 carbon atoms.
 4. The compound ofclaim 3 wherein said n-alkyl radical is octyl.
 5. The compound of claim1 wherein said alkyl radical is a cycloalkyl radical.
 6. The compound ofclaim 5 wherein said cycloalkyl radical is a cyclohexyl-n-alkyl radical.7. The compound of claim 6 wherein said cyclohexyl-n-alkyl radical iscyclohexylbutyl.
 8. The compound of claim 1 wherein the 5-substituent isselected from the group consisting of fluoro and chloro.
 9. The compoundof claim 1 wherein said alkyloxy is selected from the group consistingof methyloxy and dioxol.
 10. A compound, that is selected from the groupconsisting ofN-alkyl-2-(1-(5-substituted-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,3-(2-{2R-[4-(4-alkylcarbamoyl)-oxazol-2-yl]-pyrrolidin-1-ylmethyl}-4-substituted-phenyl)-propionicacid and alkyl esters thereof, wherein the substituent is selected fromthe group consisting of halo and alkyloxy radicals.
 11. The compound ofclaim 1 wherein said compound is selected from the group consisting of(S)—N-(4-cyclohexylbutyl)-2-(1-(5-fluoro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,(S)—N-(4-cyclohexylbutyl)-2-(1-(5-methoxy-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,(S)—N-(4-cyclohexylbutyl)-2-(1-(5-chloro-2-(3-oxo-3-(trifluoromethylsulfonamido)propyl)benzyl)pyrrolidin-2-yl)oxazole-4-carboxamide,N-(4-cyclohexylbutyl)-2-(1-{[6-(3-oxo{[trifluoromethylsulfonamido)propyl)-1,3-benzodioxol-5-yl]methyl}pyrrolidin-2-yl)-1,3-oxazole-4-carboxamideand2-{1-[5-fluoro-2-(3-oxo-3-{[(trifluoromethyl)sulfonyl]amino}propyl)benzyl]pyrrolidin-2-yl}-N-octyl-1,3-oxazole-4-carboxamide.12. A compound having the following formula:

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkyl, R₂ is selected from the group consisting of H, alkyl,halogen, OR₇ and OC(R₇)₂O; and R₃ is selected from the group consistingof H and alkyl; provided however, when R₁ is CO₂R₇, R₂ is not H.
 13. Thecompound of claim 12 wherein R₂ is selected from the group consisting ofF, Cl, OCH₃ and O(CH₂)O.
 14. The compound of claim 12 wherein R₃ isalkyl.
 15. The compound of claim 12 wherein, R₃ is (CH₂)_(n)CH₂R₇,wherein n is an integer of from 4 to 9 and R₇ is H or cyclohexyl. 17.The compound of claim 12 wherein, R₇ is selected from the groupconsisting of methyl, ethyl, i-propyl, trifluoromethyl and cyclopropyl.17. The compound of claim 12 wherein, R₁ is NHSO₂R₇.
 18. The compound ofclaim 17 wherein, R₇ is selected from the group consisting of methyl,ethyl, i-propyl, trifluoromethyl and cyclopropyl.
 19. The compound ofclaim 17 wherein R2 is selected from the group consisting of F, Cl, OCH₃and O(CH₂)O.
 20. The compound of claim 17 wherein, R₃ is (CH₂)_(n)CH₂R₇,wherein n is an integer of from 4 to 9 and R₇ is H or cyclohexyl
 21. Amethod comprising administering a compound having the following formula:

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkyl R₂ is selected from the group consisting of H, alkyl,halogen, OR₇ and OC(R₇)₂O; and R₃ is selected from the group consistingof H and alkyl; provided however, when R₁ is CO₂R₇, R₂ is not H.
 22. Themethod of claim 21 wherein said compound is administered to treat DP₁,FP, EP₁, EP₃, TP and/or EP₄ receptor mediated diseases or conditions.23. A method comprising administering a compound to treat DP₁, FP, EP₁,EP₃, TP and/or EP₄ receptor mediated diseases or conditions wherein saidcompound has the following formula:

wherein R₁ is selected from the group consisting of CO₂R₇ andCON(R₇)SO₂R₇ wherein R₇ is selected from the group consisting of H,alkyl and aryl, wherein said alkyl and aryl may be substituted with haloor haloalkyl; R₂ is selected from the group consisting of H, alkyl,halogen, OR₇ and OC(R₇)₂O; and R₃ is selected from the group consistingof H and alkyl.